deps(actions): bump actions/download-artifact from 4 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pull-request-check-publish.yml

@@ -35,7 +35,7 @@ jobs:
           password: ${{ secrets.QUAY_PULL_REQUESTS_PASSWORD }}
 
       - name: Download Pull Request Number artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: pull-request-number
           run-id: ${{ github.event.workflow_run.id }}
@@ -56,7 +56,7 @@ jobs:
           docker system prune -af
 
       - name: Download che-code docker image artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           pattern: che-*
           merge-multiple: true

.github/workflows/pull-request-check.yml

@@ -94,7 +94,7 @@ jobs:
       - name: Cleanup docker images
         run: docker system prune -af
       - name: Download editor artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           pattern: linux-*
           merge-multiple: true